Spring suspension



Aug. 27, 1940. w BQXAN 2,212,769

SPRING SUSPENSION Original Filed Feb. 6, 1937 @3 22 vn for:

PATENT OFFICE SPRING SUSPENSION Walter Boxan, Zschopau, Germany,assignor to Auto Union Aktiengesellschaft, Chemnitz, Germany Originalapplication February 6, 1937', Serial No. 124,488. Divided and thisapplication February 14, 1938, Serial No. 190,501. In Germany February8, 1936. i

6 Claims.

This application is a division of my earlier application Serial No.124,488, filed February 6, 1937.

The object of the inventionis to provide an improved spring suspensionmore particularly adapted for motor vehicles in which a rubber member isarranged between the stub axle carrier and the opposed portion of thevehicle frame.

In the accompanying drawing wherein an apm proved embodiment of theinvention is illustrated:

Figure 1 is a front elevation of the improved spring suspension showinga fragment of the vehicle frame in section.

Figure 2 is a view similar to Fig. 1 showing the stub axle carrier in anelevated position.

Figure 3 is a horizontal section on the line 33 of Fig. l.

Referring to the drawing in detail the numeral it designates the stubaxle carrier of one of the wheels of a motor vehicle which is guided bymeans of pairs of parallel link members 9. The link members 3 arepivptally mounted at ill to brackets ll carried by the vehicle frame 24and are pivotally connected at 21 to the stub axle carrier 20.

The rubber member 2 subjected to shear stresses is arranged between thestub axle carrier at and the frame member 8. For this purpose, the endsof U-shaped stirrups 3 and l are secured, respectively, to the pivotpins l0 and 21 and are arranged between the link members of the pairs 0,O. The rubber member 2 is securely connected with the oppositelydisposed webs 3, 4 of the stirrups and the'latter are provided withobliquely projecting lugs 3 and l, the lug 3b carried by the stirrup[connected with the vehicle frame projecting upwardly and outwardly fromsaid frame and the lug 4 projecting downwardly and inwardly from thevehicle frame.

As shown in Fig. 2, upon excessive deflection of the wheel, the lugs land l engage the rubber member I and thereby limit the wheel deflection.Also during deflection of the wheel the webs l and l of the stirrup moveinto closer relation to each other to the extent of the distancedesignated at a and thus a compression of the rubber is superposed onthe shear stress which is 50 applied thereto incident to thedisplacement of the wheel and this compression increases the resistanceto excessive wheel deflection.

This arrangement of the rubber member 2 relieves the link 8 to a greatextent of the stress 55 imposed thereon by the weight of the loadsupported on the vehicle and therefore the weight and size of the linkmembers may be reduced.

Instead of thewheel guiding arrangements illustrated. naturally otherarrangements can beusedflfineachcaseanaxleparteuidedin the frame isdirectly connected with a frame member by the rubber member. The rubbermembers could also be provided in multiple arrangement, for example" onboth sides of the link member.

What I claim is:

1. A springing arrangement more particularly for motor vehicles withindependent wheels, comprising a vehicle frame, a stub axle carrier,

means guiding the movement of said axle carrier with respect to saidframe, a U-shaped stirrup carried by said carrier projecting laterallytherefrom towards said frame, a U-shaped stirrup carried by said frameprojecting laterally therefrom toward said carrier, the free ends ofsaid stirrups being spaced from one another, and a rubber memberinterposed between and securely connected with the free ends of saidstirrups for connecting said axle carrier with said frame, said rubbermember being subjected to shear stresses.

2. A springing arrangement for motor vehicles with independent wheelscomprising a vehicle frame, an axle carrier, parallel links pivotallyconnected at their opposite ends to the frame and axle carrier, stirrupsconnected with the frame and axle carrier at the points of connection ofsaid link members therewith, and a rubber member subjected to shearstresses securely connected to said stirrups.

3. A springing arrangement as claimed in claim 2, characterised in thatsaid stirrups are of U-shape, said rubber member being secured to theweb portions of said U-shaped stirrups.

4. A springing arrangement as claimed in claim 2 characterized in thatsaid link members are arranged in pairs and said stirrups are arrangedbetween the links of the respective pairs.

5. A springing arrangement as claimed in claim 2 characterized by theprovision of lugs carried by said stirrups and arranged to abut againstsaid rubber member during excessive deflection of the vehicle wheel.

6. A springing arrangement more particularly for motor vehicles withindependent wheels, comprising a vehicle frame, a stub axle carrier,means guiding the movement of said axle carrier with respect to saidframe, an abutment on said carrier projecting laterally therefromtowards said frame, an abutment on said frame projecting laterallytherefrom toward said carrier, said abutmentshaving laterally opposedspaced confronting faces, and an elastic member interposed between saidfaces and abutting thereagainst. whereby movement of said abutmentstoward one another upon deflection of the wheels will be resisted bysaid elastic member.

WALTER BOXAN.

